Download Learnerz IAS app from the Play Store now! Download



Ocean Temperature UPSC NOTE

 Why in News

  • Ocean temperatures hit a record high in February.

  • With the average global sea surface temperature at 21.06 degrees Celsius (69.91 degrees Fahrenheit).

  • The EU’s Copernicus Climate Change Service (C3S) said on March 7.

  • February’s average sea surface temperature surpassed the previous record of 20.98°C (69.77°F) set in August 2023, in a dataset that goes back to 1979.

Alarming rise in ocean temperatures and its consequences

  • The oceans are absorbing a massive amount of heat, and the consequences are dire. 

Here's a breakdown of this alarming trend:

  • The Reality: Our oceans are experiencing record-breaking temperatures

  • February 2024 saw the hottest average global sea surface temperature ever recorded, surpassing the previous record set just months before.

  • This relentless warming trend is attributed to greenhouse gas emissions and climate change.

  • The Culprit: The primary culprit behind rising

ocean temperatures is greenhouse gas emissions, particularly carbon dioxide, which trap heat in the atmosphere. 

  • The oceans act like a giant heat sink, absorbing much of this excess heat.

  • The Consequences: The effects of a warming ocean are widespread and far-reaching:

    • Marine Life Disruption: Coral reefs, vital marine ecosystems, bleach and die due to rising temperatures. 

    • Fish populations are forced to migrate to cooler waters, disrupting food chains and fisheries.

  • Extreme Weather Events: Warmer oceans fuel more powerful storms and hurricanes.

  • Increased evaporation leads to heavier precipitation in some areas and exacerbates droughts in others.

  • Sea Level Rise: As oceans warm, they expand, causing sea levels to rise

  • This threatens coastal communities with flooding and erosion.

  • Ocean Acidification: Oceans absorb some of the excess carbon dioxide, becoming more acidic. 

  • This harms marine life with calcium carbonate shells and skeletons, like shellfish and coral.

  • The Ripple Effect: The consequences of rising ocean temperatures extend far beyond marine life. 

  • They impact food security, coastal economies, and weather patterns worldwide.

  • The Need for Action: Urgent action is required to curb greenhouse gas emissions and mitigate climate change

  • This includes transitioning to renewable energy sources, reducing dependence on fossil fuels, and implementing sustainable practices.

Impact on Coral Reefs

  • Coral Bleaching: This is the most immediate and visible consequence

  • Corals have a symbiotic relationship with algae called zooxanthellae

  • These algae live within the coral tissues and provide them with nutrients through photosynthesis. 

  • However, rising water temperatures stress the coral, causing them to expel the zooxanthellae, which drains their color and leaves them pale or white - hence the term "coral bleaching.“

  • Bleached corals are more susceptible to disease and death.

  • Reduced Growth and Calcification: Warmer water slows down the growth rate of corals and disrupts their ability to build their calcium carbonate skeletons

  • This weakens reefs and makes them more vulnerable to damage from waves, storms, and erosion.

  • Shifts in Coral Distribution: As temperatures rise, some coral species may migrate to cooler waters in search of suitable conditions

  • This can disrupt entire ecosystems and put stress on the corals as they adapt to new environments.

  • Loss of Biodiversity: Coral reefs are incredibly diverse ecosystems, teeming with marine life.

  • When coral reAefs decline, it has a domino effect on the entire food chain. 

  • Fish populations dwindle, and the vibrant underwater world loses its complexity.

Causes of temperature rise in ocean

  1. Greenhouse Gases 

  2. Fossil Fuel Burning

  3. Deforestation 

  4. Industrial Processes 

  5. How it Affects Oceans

  6. Heat Absorption

  7. Uneven Distribution



Amritsar,1,April 2024,117,Art & Culture,1,August 2023,251,Courses,7,Daily Current Affairs,48,December 2023,189,Disaster Management,2,Environment and Ecology,54,February 2024,228,Foundation Course,1,GDP,1,GEMS Club,1,GEMS Plus,1,Geography,67,Govt Schemes,2,GST,1,History,2,Home,3,IAS Booklist,1,Important News,71,Indian Economy,46,Indian History,2,Indian Polity,56,International Organisation,12,International Relations,58,Invasive Plant,1,January 2024,240,July 2023,281,June 2022,6,June 2023,268,March 2024,238,May 2022,17,Mentorship,2,November 2023,169,October 2023,203,Places in News,2,Science & Technology,66,September 2023,205,UPSC CSE,111,
Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Ocean Temperature UPSC NOTE
Ocean Temperature UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy Table of Content